Some notes from when I attached the DLT drive to Jenny, one of the Dell machines


I installed a leftover Differential SCSI adapter we had sitting around, which
according to /etc/sysconfig/hwocnf, turned out to be an
  LSI Logic / Symbios Logic|53c875

The device driver for this adapter was sym53c8xx.  According to some forum posts,
you needed to be at kernel level 2.4.21-20.EL, which was the latest I had, so
this wasn't a problem.

In /etc/modules.conf, there appeared this line,
  alias scsi_hostadapter1 sym53c8xx
and a lsmod command showed sym53c8xx loaded, so all appeared to be as it should.

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In /proc/scsi/scsi, were these lines,
  Host: scsi2 Channel: 00 Id: 06 Lun: 00
    Vendor: QUANTUM  Model: IBM-7205         Rev: 2560
    Type:   Sequential-Access                ANSI SCSI revision: 02

so Linux was seeing the tape drive.  The last piece was to get the st module
(SCSI Tape) to see this device as a tape drive and set up /dev/st0 for me.

This wasn't happening 'till I rebooted a few times.  I'm not sure what ultimately
fixed things, but finally these commands worked.
  mt -f /dev/st0 rewind
  tar tvf /dev/st0

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The last thing missing was /dev/rmt0.  Seems like Linux shoulda made a link for
me, /dev/rmt0 -> /dev/st0, but it wasn't there, so I added it manually
  ln -s st0 /dev/rmt0

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